. >> and an oil sheen found near the site of the bp spill in mexico matches oil from the 2010 disaster. >> the coast guard says tests stished the oil did come from the bp well. it could be debris from the calamity. >> the coast guard says bp may be held liable for the new oil. the sheen first reported september 16th and does not pose a risk to the shore line but cannot be cleaned up if it seems like traffic is grinding to a halt, that is not an illusion, people. >> according to a latest congestion index, san francisco is now the second most congested u.s. city up from number five. get this, only los angeles is worse. >> yike. >> navigation systems maker found average travel times are 29% longer during peak commute periods. and some other findings for each hour on the road during rush hour, 34 minutes is caused by delays. >> you should avoid driving on thursdays, that is the most-congested day here in the bay area. >> which would be... today. >> right now. yes. >> and look at the bridge behind us. >> yes. >> thanks for joining us for abc 7 news at 4:00. >> abc 7 news at 5:00 begins righ